"Diana: A Celebration" opens this weekend at the Mall of America in Bloomington, Minnesota, where Diana's wedding gown—the crown jewel in the exhibition celebrating her life—will reside until June 10.

Now more than thirty years old, the trend-defining gown features a 25-foot train of ivory silk taffeta, antique lace that once belonged to Queen Mary, hand-embroidered mother-of-pearl sequins, and some 10,000 pearls. Although couturier David Emanuel and his wife Elizabeth spent months preparing the gown under top-grade security, the first polyester-satin knockoff hit department stores just five hours after the Royal wedding in 1981.

Visit dianaexhibition.com for more information, and click here to see our slideshow detailing Charles and Diana's landmark wedding.